NOTES AND ABSTRACTS. 



641 



Raspberry Industry, The Colorado. By E. S. Henick and 



E. E. Bennett (U.S.A. Exp. Stn., Colorado, Bull. 171, Nov. 1911; 

 figs.).— Easpberry growing has become an important industry in 

 several districts of Colorado, and will probably increase in future, the 

 conditions being very favourable. This bulletin gives an account of 

 the requirements of the plant, full cultural directions, advice in propaga- 

 tion, pruning and harvesting, and on the best varieties of the three 

 sorts of raspberry — red, blackcap, and purple cane — for market 

 purposes in Colorado. A descriptive hst is added of the diseases to 

 which the canes are Hable, with the appropriate treatment for each. 



M. L. H. 



Rhododendron occidentale (Die Gart., Nov. 25, 1911, pp. 650). 



—Hardy deciduous species from North America, with handsome pure 

 white flowers, and very sweet-scented. It will thrive well, both in 

 sunny and shady positions, as long as it is kept moist. — G. R. 



Rhododendron rosmarinifolium (Die Gart., Dec. 1911).— 



Hardy in the north of Europe, and, like R. occidentale, deciduous, 

 flowering very freely during the spring for several weeks. — G. R. 



Richardias (Double Hybrid). By C. Platel (Le Jard., xxv , 586, 

 p. 220; July 20, 1911; 2 figs.). — The author is endeavouring to estab- 

 lish a race of double Arums ' by crossing Richardia devonie7isis and 

 ' Perle de Stuttgart,' and has been successful in a large number of 

 cases. He obtains pure white double spathes, the outer one being very 

 large, with a fine yellow spadix. As they now come true from seed, he 

 hopes that the type is established. — F. A. W. 



Roses (New) (Gard., 1911).— ' Mrs. George Shawyer ' (May 27, 

 1911, p. 248); ' Portia ' (June 3, 1911, p. 261); ' Marguerite Guillot ' 

 (June 10, 1911, p. 272); ' Frances Charfceris Seton ' H. T. (July 29, 

 1911, p. 356); 'Herisson' H. T. (Aug. 5, p. 369); 'Duchess of 

 Wellington ' H. T. (Nov. 4, 1911, pp. 532, 533); ' W. E. Smith ' T. 

 (Nov. 11, 1911, p. 544).— if. R. D. 



Roses, The Parentage of. By E. Daniels (Gard., 1911). Lists- 

 of Eoses with their parentage will be found in the following numbers : — 

 May 13, p. 231; May 20, p. 243; May 27, p. 254; June 3, p. 266; 

 I June 10, p. 278; June 17, p. 290; July 1, p. 314; July 8, p. 326; 

 July 15, p. 338; July 22, p. 350; July 29, p. 362; Aug. 5, p. 374; 

 Aug. 12, p. 386; Aug. 19, p. 404.— ff. R. D. 



j Silver-leaf Disease. By D. Houston [Gard.., Jan. 16, 1911, 

 I p. 16). — Silver-leaf is a disease which occurs in many trees, but notably 

 j in stone fruits, and is becoming more and more prevalent. Its chief 

 s characteristic is a whitish or silvery appearance of the foliage. At 

 ! first the disease has little effect upon growth or fruitfulness, but after 



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